Description

Tinuvin 571 is a high-performance, low-basicity hindered amine light stabilizer (HALS) designed for long-term polymer protection. It effectively prevents photo-oxidative degradation, thereby extending the service life and maintaining the mechanical properties and color of finished products. This additive is essential for manufacturers in the plastics, coatings, and automotive industries seeking to enhance the durability of their materials against UV radiation and thermal aging.

Application

• Primary stabilizer in polyolefins (PP, TPO, PE) for automotive parts, outdoor furniture, and geotextiles.
• Critical component in industrial and automotive coatings, including refinish and OEM coatings, to prevent gloss loss and chalking.
• Protection of engineering plastics such as polyamide (PA) and thermoplastic polyurethane (TPU) in demanding applications.
• Use in adhesives and sealants to maintain elasticity and bonding strength under outdoor conditions.
• Stabilization of masterbatches and concentrates for consistent and efficient downstream processing.
• Enhancing the weatherability of plastic films used in agriculture and packaging.

Basic Information

Product Name	Tinuvin 571
CAS No.	23328-53-2
Molecular Formula	C₂₈H₅₂N₂O₂
Molecular Weight	448.7 g/mol
Synonyms	Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate; Bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate (common); Low Basicity HALS; Light Stabilizer 571; UV-571; LS-571; Sebacate-based HALS; Polymer stabilizer 23328-53-2
EINECS	245-623-0

Quality Control

Every batch of Tinuvin 571 is manufactured and tested under a stringent quality management system to ensure consistent high performance. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) detailing purity, assay, and key physical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Light yellow to amber viscous liquid
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 96.0 %
Color (Gardner)	≤ 4
Refractive Index (n20D)	1.467 - 1.477
Density (20°C)	0.99 - 1.01 g/cm³
Viscosity (23°C)	800 - 1200 mPa·s
Flash Point	> 100 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.